Automatic furnace-regulator.



v c. E. ANDERSON. AUTOMATIC FURNACE REGULATOR.

APPLICATION FILED FEB. l3} I915.

1,139,095. I Patented May 11, 1915.

2 SHEETS-SHEET l- C. E. ANDERSON. AUTOMATIC FURNACE REGULATOR.

APPLICATION FILED FEB. 13, I915.

Patented May 11, 1915.

2 SHEETS-SHEET 2.

cameras E. aiv'mznson, or cnrcaeo, ILLINOIS.

AUroMA'rIc FURNAGE-BEGUIJATOR.

aieaoas.

Specification of Letters Patent.

Patented May 11, 1915.

Application filed February is, 1915. Serial No. 7,968.

lators, of which the following is a specification. 1

. My invention relates to an improvement in means for automatically regulating the steam-pressure. in heating furnaces working under low pressure, by causing relatively low pressure to open the draft and close the check onthe furnace and relatively high pressure to close the draft and open the check.

In the accompanying drawings, Figure 1 is a view in side elevation of a steam-generating heating furnace, of the sectionalboiler type, equipped with my improved regulator; Fig. 2 shows the regulator as in Fig. 1, but on a larger scale and broken; Fig. 3 is a broken section on line 3, Fig. 2, showing'the regulator attached to-the boiler, and Fig. 4 is an enlarged section on line.4, Fig. 3, through the collapsible water-receptac e.

The furnace 5, provided with the usual hinged front-draft door or valve ,6 and hinged rear-check door or valve 7, has a steam-pipe 8 rising from the top of the boiler 9. This pipe has coupled to it an upper horizontally extending section 8*, to which. is coupled a depending section 8 threaded about its lower end where it carries a T-head 10 connected by an overflow-pipe 11 with a similar-head 12 let into the rising section of the steam-pipe. A threaded coupling. member 13 (Fig. 4) screws into the lower end of the head 10 and into the centralinternally threaded nipple 14 of an upper cap-plate 15 having opposite dependingcars 16. A bellows-like receptacle 17, of suitable highly flexible material, preferably thin sheet-copper, is provided with an n per head 18 having a central externa y threaded-nipple 19 screwing into the nipple 14, whereby the receptacle is carried by the steam-pipe 8; The lower receptacle-head 18", which is a counterpart of the head 18, is coupled, like the latter, toa lower cap 15, which is a counterpart of the cap 15 and provided with opposite ears 16f. The corresponding ears 16 and 16 are pivotally connected at 20; and those on one side of the receptacle are provided with upper and lower lugs 21 and 22, the upper lug carrying a pair of set-screws 23jto form stops adjustable for regulating the extent of col-' lapsin the receptacle as hereinafter describe A threaded coupling sleeve 24 screws into the nipple on the lower cap 15* and carries a T-head 25 having one end plugged by a rod 26 screwed into itand carrying adjustably a'counterweight 27. An upwardly-curved pipe 28 extends from the opposite end of'the head 25and terminates in an air-vented water-receptacle 29 provided with an upper lug 30 connected by a chain 31, passing over guide-pulle s, as shown in Fig. 1, with the check-door i, and a lower lug 32 connected by a chain 33 with the draft-door 6.

The regulator is more particularly designed for use on the low-pressure boilers of household heating furnaces, which carry,

normally, about 3 ounces of pressure. As the apparatus is represented in operation in Fig. 1 the relatively. high steam-pressure has caused the door 6 to close and the door 7 to open for checking the furnace-fire. This has resulted from the pressure in the pipe 8 being exerted on the water in the collapsible receptacle 17 to force the water through the pipe 28 into the receptacle 29 and thus so increase the gravity thereof against that of the weight 27- as to cause the receptacle 29 to-descend, dropping the door 6 and raising the door 7 this movement being permitted' by the flexibility of the receptacle 17 which is collapsed along one side to the extent permitted by a respective stop 23 by the pressure of the cap 16 in turning on the pivots 20, with the descent of the waterweighted receptacle. When .the steam-pressure becomes reduced to a predetermined extent, the water-level in the receptacle 29- drops by flow of the water back into the collapsible receptacle, thereby reducing the gravity of the receptacle 29 to an extent which enables the weight 27 to act to. raise it on the pivots 20, with resultant collapsing of the receptacle 17 at its opposite side, to the extent permitted by the other stop 23, to open the draft-door 6 and close the check-door 7. Any overflow from the receptacle 17, which may result from its becoming overfilled by water of condensation from the steam, runs back into the boiler through the pipe 11. a

The regulator thus described is sensitive and thoroughly reliable in its operation, and of very simple and durable construction.

What I claim as new and desire to secure by Letters Patent is n 1. An automatic regulator of the character described, comprising a collapsible receptacle, pivotally connected caps between which said receptacle is confined, a steampipe adapted to be connected at one end with a steam-boiler and leading into said receptacle, an upwardly extending waterpipe secured to the lower cap and communicating with said receptacle, a weight on the lower end of said water-pipe, and a waterreceptacle on the upper end thereof.

2. An automatic regulator of the character described, comprising a collapsible receptacle, pivotally connected caps between which said receptacle is confined, a steampipe having a rising section adapted to be connected at one end with a steam-boiler and a downwardly'extending section leading into the upper end of said receptacle, an overflow-pipe connecting said pipe-sections, an upwardly curving water-pipe secured to the lower cap and communicating with said receptacle, a weight on the lower'end of said water-pipe and a water-receptacle on the upper end thereof.

3. An automatic regulator of the character described, comprising a collapsible receptacle, pivotally connected. caps between which said receptacle is confined, a steampipe adapted to be connected at one end with a steam-boiler and leadin into one end of said receptacle, an upwar ly curving water-pipe secured to the lower cap and communicating with said receptacle, a weight on the lower end of said water-pipe and a water-receptacle on the upper end thereof, and a stop-device on said caps near their pivotal connection.

4. 'An automatic regulator of the character described, comprising a collapsible receptacle, caps secured on the opposite heads of said receptacle, having mutually overlapping cars at which they are pivotally connected together, a steam-pipe having a rising section adapted to be connected at .one end-with a steam-boiler and a downwardly extending section leading through the upper cap into said receptacle, an up-- furnace, provided with a lower front draftdoor and an upper rear check-door, a regulator comprising a collapsible receptacle, pivot-ally connected caps between which said receptacle is confined, a steam-pipe rising from the boiler and having a depending section leading into the upper end of said receptacle, an overflow-pipe connecting the rising and depending steam-pipe sections, an upwardlyextending water-pipe secured to the lower cap and communicating through the latter with said receptacle, a weight on the lower end of said water-pipe and a Water-receptacle on the upper end thereof having connections with said doors.

CHARLES E. ANDERSON. In presence of O. C. AvIsUs, F. M. RONDEAU. 

